I WAS RECENTLY IN AN AUTO ACCIDENT GOING ABOUT 30 MPH WHERE I RAN INTO THE REAR END OF ANOTHER VEHICLE. I DRIVE A 2004 JEEP GRAND CHEROKEE LAREDO. MY CONCERN IS NEITHER MY DRIVER NOR MY PASSENGER AIR BAG WENT OFF AND I HIT THE OTHER VEHICLE HARD ENOUGH THAT THE FRONT OF MY JEEP PUSHED MY PASSENGER FENDER BACK TO WHERE I WAS UNABLE TO OPEN MY PASSENGER DOOR. AT WHAT SPEED SHOULD MY AIRBAGS HAVE GONE OFF? *JB